Hydrocarbon peroxidation: protective effect of reverse micelles

Hydrocarbon peroxidation: protective effect of reverse micelles
Gebicki, J.; Gebicka, L.
2004-10-07 00:00:00
Pulse radiolysis technique was used to study radical processes in AOT/n-heptane and AOT/n-heptane/water reverse micellar systems. It was found that reverse micelles, especially socalled 'wet' micelles ([H2O]/[AOT] > 10), significantly diminished the yield of peroxyl radicals formed when the system contained trace amounts of oxygen. The possible mechanism of such protective effect of micellar aggregates is discussed in terms of scavenging of charges, both electrons and cation radicals, by micellar aggregates where they can eventually form radicals. The latter are however separated from the traces of oxygen which remains mainly in the continuous hydrocarbon phase, where it dissolves much better than in the micellar water core.
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Abstract

Pulse radiolysis technique was used to study radical processes in AOT/n-heptane and AOT/n-heptane/water reverse micellar systems. It was found that reverse micelles, especially socalled 'wet' micelles ([H2O]/[AOT] > 10), significantly diminished the yield of peroxyl radicals formed when the system contained trace amounts of oxygen. The possible mechanism of such protective effect of micellar aggregates is discussed in terms of scavenging of charges, both electrons and cation radicals, by micellar aggregates where they can eventually form radicals. The latter are however separated from the traces of oxygen which remains mainly in the continuous hydrocarbon phase, where it dissolves much better than in the micellar water core.